Tonnage-computer



{No.Model.)

G. G. WARREN. TONNAGE COMPUTER.

No. 528,703. Patented Nov. 6, 1894.

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GEORGE G. WVARREN, OF SAGINAW, MICHIGAN.

ToNNAoE-ooMPuTER.

SPECIFICATION forming part of Letters Patent No. 528,703, dated November 6, 1894.

Application filed December 23, 1893- Serial No. (071105910 To all whom it may concern.-

Be it known that I, GEORGE QWARREMQ citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, haveinvented certain new and useful Improvements in Tonnage-Computators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention is a tonnage computator, and consists in the special features of construction, arrangement and combination described and claimed.

Figure I is an elevation of the computator. Fig. 11 is same view with part broken away.

In the drawings, A, A, is the frame, and consists of two pieces of any stiff material of the same size and form, each provided with a triangular slot S, radiating from the center of each, said slot being of the size hereinafter mentioned. Between these two pieces I place a disk B, and through the center of the frames and the center of the disk 'I pass a rivet O, loosely securing the frames together and forming a shaft or bearing for the disk in order that it may rotate within the frames.

On one side of the frame I out in anotch T, and beyond the edge of the disk B, so that the edge of the disk projects into the notch. By placing the finger on the edge of the disk it can be rotated with ease. Upon either side of this disk I arrange radial columns of figures, B, said columns radiating from the center to the circumference of the disk. Said figures are also arranged in concentric circles. The column of figures commencing on the inner circle with numbers of three figures, and increasing in a decimal ratio toward the outside of the column, the numbers read from left to right. The next column at the right would commence with a number of three figures, and larger according to a decimal ratio than the first number in the column to the left, and so on around the disk until the disk is full.

The opposite side of the disk is arranged in the same manner and commencing where we left off on the other side. In the drawings, Fig. II, we have filled outbut one of these columns. Fig. I shows another.

The slot S, in the frames A, A, is large enough to show the entire radial column of figures, and no more. By turning the disk B, other columns can be brought to view in turn. There being a slot S, on each side of the frame any column may be brought to view desired, either large or small. The outer edges of these slots are divided into spaces as shown by Fig. I, viz: The right hand edge of the slot is divided into as many spaces as there are numbers in the radial column of the disk B to be revealed through the space, and the left hand edge divided into one half as many spaces as the right hand edge, or one half as many as there are numbers in the radial column on the disk. The corners of the frame are secured together, but not tight enough to prevent the disk rotating.

As previously stated, the object of my invention is to provide a ready and quick tonnage computator. To ascertain the cost of any number of pounds of any commodity figured by the net ton of two thousand pounds, first place the finger on the outside of the edge of the disk as it protrudes in the slot T, rotate it in either direction until the desired price, even dollars and quarters thereof, are shown by the figure on the top line of the disk through the slot S. For example, what would be the cost of twenty-two thousand twohundred and twenty pounds of hay at nine dollars per ton? Turning the disk until we have the price, $9, we see by the full four figures of that line that 20,000 pounds would cost $90.00 2,000 9.00 S C C .90

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Having thus described my invention, wh I claim as new,'and desire to secure by Letters Patent, is-

In a tonnage computator, the combination with the disk B having upon each side therof columns of figures radiating from the center edges being radii, the slots being directly opposite each other in the frame and each having its edges divided into spaces, the right edge having twice as many spaces as the left edge and each slot being large enough to reveal a single radial column of figures on the disk B, and the notch T in the side of the frame exposing the edge of the disk 13 for the purpose of rotating it as desired by the hand, as and for purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE O. WVARREN. Witnesses:

A. H. SWAR'IHOUT, J. F. OKEEFE. 

